Dhruva was Humbled

Dhruva's step brother Uttama was fond of reckless hunting. Once, while hunting, he was killed by Yakhas (semi-gods). The news of the demise of Uttama reached Dhruva.

To take revenge on the Yakshas, Dhruva decided to wage war against them and wipe out the Yaksha race itself. Both sides fought ferociously. Dhruva decided to use ‘Narayana Astra' (a powerful weapon that would result in catastrophe).

Swayambhu Manu, Dhruva's grandfather, intervened and stopped Dhruva from using Narayana Astra. He said Yakshas did not kill his Uttama but the ‘Time’ factor that took away his life. None can escape this 'Time' component, while Yakshas was just a medium in the process. 

Manu also warned Dhruva that Kubera, the king of Yaksha, is a friend of Lord Shiva. Conquering Kubera is next to impossible. He asked Dhruva to seek an apology from Kubera. 

Dhruva respectfully accepted his grandfather's advice and thought for a while on how to approach Kubera. To his surprise, Kubera appeared before him as he knew Dhruva's achievements and had held him in high regard.  

When Kubera asked Dhruva for a boon, he sought to be blessed with constant devotion towards Srihari with the help of which one can cross the ocean of worldly existence. 

Take away:

Do not rush to conclusions and take action. You may regret it.

Always respect elders.